Chemical response of parsley and mentha herbs to certain stress agents

In response to certain stress agents, infection with Cercospora petroselini and treatment of this infection with Cuprosan, changes in the quantity and quality of the volatile oils produced from Mentha piperita L. and Petroselinum Crispum Mill become apparent. The treated samples showed increase in the concentration of Cu ions in the leaves. Some components were produced under the effect of these stress agents (infection and treatment). Psoralen was isolated from samples treated with Cu salts. Corylidin, Angladin and Pereflorin B were isolated from Parsley herb under the influence of Cercospora petroselini infection. These compounds were examined for antimicrobial activity. Corylidin, Angladin and Psoralen, inhibited growth of Pseudomonas putida , E. Coli and Rhizobium meloloti (gm−ve bacteria) , while Pereflorin B inhibited Streptococcus lactis and Bacillus subtilis (gm+ve bacteria). ©